What helps best with a hangover?

Hydration (water and electrolytes), sleep, food and time. Alcohol dehydrates you, so drinking water is the most important thing. A hair of the dog only postpones the symptoms.

How long does a hangover last?

A hangover typically lasts 8–24 hours depending on how much you drank and on the individual. A severe hangover can last the whole day.

Why do hangovers feel worse as you get older?

Metabolism slows with age, so alcohol leaves the body more slowly. The recovery capacity of the liver and the body also declines.

Can a hangover be prevented?

Best of all by drinking less. In addition, water between drinks, eating and enough sleep reduce the symptoms. Dark alcohol (cognac, red wine) often causes a worse hangover.

Hangover Calculator — How Long It Lasts

Estimate hangover severity and duration by drinks, sleep and hydration. Get recovery tips. Free hangover calculator.

Drinks consumed: 10 pcs

Weight: 75 kg

Sleep: 5.00 h

Water drunk in the evening: 2 glasses

10 hours

Estimated hangover duration

Hangover score (0–100)	54 /100
Estimated duration	10 hours
Recommended water now	2.1 liters

ℹ️ A hangover is caused by dehydration, lack of sleep and the metabolic byproducts of alcohol. Water, rest, salty foods and pain relief (not paracetamol, because of the liver) help. This estimate is for entertainment only.

This hangover calculator estimates how strong and how long your hangover is likely to be based on the drinks you had, your weight, how much you slept and how much water you drank in the evening. It also gives practical tips for a faster recovery.

How the calculator works and what it’s for▾

How the estimate works

The tool combines four factors: more drinks and a lower body weight push the hangover score higher, while a short night's sleep also raises it and plenty of water in the evening lowers it.

You get a hangover score from 0 to 100, an estimated duration in hours and a recommendation for how much water to drink right now.

What you enter and what you get

Enter the number of drinks, your weight in kilograms, your hours of sleep and the glasses of water you had in the evening. The more accurate your inputs, the better the estimate.

The score reflects how intense the symptoms may feel, the duration roughly tells you when you should feel better, and the water recommendation helps you rehydrate.

Why a hangover feels bad

A hangover is caused by dehydration, lack of sleep and the by-products of alcohol metabolism that strain the body. That is why water, rest and food are the most effective remedies.

Salty foods restore electrolytes and pain relief can ease a headache — but avoid paracetamol, as it puts extra load on the liver.

Good to know

This estimate is for entertainment only and is not medical advice. Everyone reacts to alcohol differently, so treat the result as a rough, indicative guide.

🔄 Reviewed June 2026